'Zinnwaldite' definitions:

Definition of 'zinnwaldite'

(from WordNet)
noun
A mica containing iron and lithium

Definition of 'Zinnwaldite'

From: GCIDE
  • Zinnwaldite \Zinn"wald*ite\, n. [So called after Zinnwald, in Bohemia, where it occurs.] (Min.) A kind of mica containing lithium, often associated with tin ore. [1913 Webster]